GoGlenroy, I really do think you are starting to realise the...

GoGlenroy, I really do think you are starting to realise the impact of CO2. I would say though that its probably best to leave the calculations to the experts. Also, on the subject of water vapour - water vapour is in and out of the atmosphere like its going out of fashion. If man wre to pump vast amounts of water vapour into the atmosphere, it would probably just rain more, LOL. There is only so much water vapour the atmosphere will hold, otherwise there would be no oceans, lakes or river, only clouds! On the other hand, CO2, CH4 and the other man made greenhouse gases sit in the atmosphere for tens, hundreds and in some cases thousands of years. That is the big difference, the accumulation. Water vapour does not accumulate in the same way, its evaporated one day and then its raining (or snowing over England) the next!